There are 2 types of Booking Calendar translations.
1) One list of translations located at WordPress repository. Please note, these translations at your website should be located at: "../wp-content/languages/plugins/" folder.
2) Another list of translations located at the Booking Calendar website. You can download the original PO translations files from here. Please note, these translations at your website should be located at: "../wp-content/plugins/{Booking Calendar Folder}/languages/" folder.
By default Booking Calendar plugin try to use translations from "../wp-content/languages/plugins/",
if failed (not exist), then try to use translations from "../wp-content/plugins/{Booking Calendar Folder}/languages/" folder.
This behavior is possible to change at the Booking > Settings General page in the Translation section.
You can check instruction how to make or update local plugin translation files at this page.
Translations available in paid versions of Booking Calendar:
Dutch 100% [ 2314 / 2314 ], fuzzy 0, not translated 0
French (France) 97.31% [ 2243 / 2305 ], fuzzy 56, not translated 6
Hungarian 97.19% [ 2249 / 2314 ], fuzzy 46, not translated 19
German 96.59% [ 2235 / 2314 ], fuzzy 79, not translated 0
Spanish (Spain) 87.72% [ 2022 / 2305 ], fuzzy 119, not translated 164
Turkish 83.86% [ 1933 / 2305 ], fuzzy 237, not translated 135
Greek 83.38% [ 1922 / 2305 ], fuzzy 240, not translated 143
Danish 83.12% [ 1916 / 2305 ], fuzzy 254, not translated 135
Portuguese (Brazil) 83.02% [ 1921 / 2314 ], fuzzy 243, not translated 150
Italian 80.91% [ 1865 / 2305 ], fuzzy 152, not translated 288
Spanish (Mexico) 77.31% [ 1782 / 2305 ], fuzzy 333, not translated 190
Romanian 76.27% [ 1758 / 2305 ], fuzzy 342, not translated 205
Swedish 75.79% [ 1747 / 2305 ], fuzzy 357, not translated 201
Finnish 75.57% [ 1742 / 2305 ], fuzzy 360, not translated 203
Polish 75.1% [ 1731 / 2305 ], fuzzy 358, not translated 216
Norwegian (Bokmål) 74.62% [ 1720 / 2305 ], fuzzy 372, not translated 213
Arabic 73.67% [ 1698 / 2305 ], fuzzy 388, not translated 219
Russian 72.65% [ 1679 / 2311 ], fuzzy 630, not translated 2
Slovenian 72.62% [ 1674 / 2305 ], fuzzy 401, not translated 230
Chinese (Taiwan) 70.2% [ 1618 / 2305 ], fuzzy 455, not translated 232
Bulgarian 69.93% [ 1612 / 2305 ], fuzzy 432, not translated 261
Portuguese (Portugal) 68.29% [ 1574 / 2305 ], fuzzy 455, not translated 276
Chinese (China) 67.51% [ 1556 / 2305 ], fuzzy 442, not translated 307
Thai 65.68% [ 1514 / 2305 ], fuzzy 498, not translated 293
Hebrew 65.38% [ 1507 / 2305 ], fuzzy 485, not translated 313
Ukrainian 65.04% [ 1505 / 2314 ], fuzzy 489, not translated 320
Japanese 64.26% [ 1487 / 2314 ], fuzzy 18, not translated 809
Galician 63.99% [ 1475 / 2305 ], fuzzy 538, not translated 292
Slovak 59.35% [ 1368 / 2305 ], fuzzy 473, not translated 464
Catalan 58% [ 1337 / 2305 ], fuzzy 493, not translated 475
Croatian 57.53% [ 1326 / 2305 ], fuzzy 496, not translated 483
Czech 51.02% [ 1176 / 2305 ], fuzzy 556, not translated 573